Just think of all the rigs that don't even have jacks. I've got a friend with a 15-year-old 30' class C with no jacks or stabilizers, and it's been sitting on the suspension and tires its entire life with no issues.
FWIW, we do level ours at home, but we keep the refrigerator running. If we didn't do that I'd just park it.
2017 Thor A.C.E. 30.1
F53 18,000 GVWR